Android--ListView滾動條樣式

當ListView的記錄超過4頁時纔會顯示滑塊

java代碼：
[html] view plaincopy
package com.example.test0123;

import java.lang.reflect.Field;
import android.app.Activity;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;

public class TestList extends Activity {
ListView lv;

protected void onCreate(Bundle savedInstanceState) {  
    super.onCreate(savedInstanceState);  
    setContentView(R.layout.list);  
    lv = (ListView) findViewById(R.id.listView1);  
    lv.setAdapter(new ListAdapter());  

    try {  
        Field f = AbsListView.class.getDeclaredField("mFastScroller");  
        f.setAccessible(true);  
        Object o = f.get(lv);  
        f = f.getType().getDeclaredField("mThumbDrawable");  
        f.setAccessible(true);  
        Drawable drawable = (Drawable) f.get(o);  
        drawable = getResources().getDrawable(R.drawable.ic_launcher);  
        f.set(o, drawable);  
    } catch (Exception e) {  
        throw new RuntimeException(e);  
    }  

}  

public class ListAdapter extends BaseAdapter {  

    public int getCount() {  
        return 200;  
    }  

    public Object getItem(int position) {  
        return null;  
    }  

    public long getItemId(int position) {  
        return 0;  
    }  

    public View getView(int position, View convertView, ViewGroup parent) {  
        TextView tv = new TextView(TestList.this);  
        tv.setTextSize(30);  
        tv.setText("aaaaa" + position);  
        return tv;  
    }  
}  

}

list.xml代碼：設置fastScrollEnabled爲true

[html] view plaincopy